ICD-10-CM 2027
ICD-10 code for Singapore hemorrhagic fever
From the official ICD-10-CM alphabetic index entry “Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › Singapore hemorrhagic”. Page updated September 29, 2026.
About coding Singapore hemorrhagic fever
The ICD-10-CM code for Singapore hemorrhagic fever is A91 (Dengue hemorrhagic fever).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Common questions about Singapore hemorrhagic fever ICD-10 codes
What is the ICD-10 code for Singapore hemorrhagic fever?
- A91 — Dengue hemorrhagic fever.
Is A91 billable?
- Yes. A91 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A91 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A91 as a principal diagnosis.
Is A91 a CC or MCC?
- A91 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.